Questions about piping issues

Certification Action Line features questions and answers typical of those appearing in Water Quality Association (WQA) certification examinations. Some answers may not satisfy everyone of every condition.

Certification Action Line features questions and answers typical of those appearing in Water Quality Association (WQA) certification examinations. Some answers may not satisfy everyone of every condition.

1. What does not materially affect the friction loss in a given length of pipe?a) hardness of the waterb) number of fittingsc) roughness of the interior of the piped) velocity of the flow

2. The least head loss in a pipeline would be caused by a fully open:a) angle valveb) check valvec) gate valved) globe valve

3. The C factor of a water pipe is the measurement of the:a) area to pipe diameterb) cost to diameter ratioc) pipe diameter to aread) interior roughness

6. The type of corrosion caused by the use of dissimilar metals in water systems is known as _______ corrosion.a) causticb) galvanicc) oxygend) tubercular

7. Red water is experienced in one home while no problem exists in nearby homes. Laboratory tests show that the water is not corrosive. You should check:a) temperature in all pipingb) piping for excessive scale buildupc) head lossd) for bacteria

8. Corrosion may be observed in a distribution system as:a) an electric shockb) a red water problemc) causing an increase in water velocityd) causing dirt or nuisance organisms

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